US4020823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot air heating system
Assignee: Individual
•
Filing: 1975-08-11
•
Granted: 1977-05-03
•
Expires: 1995-08-11
Abstract
Abstract The hot air from a primary combustion chamber is passed through a specialized heat exchange enclosure unit which contains a plurality of spaced, substantially vertically oriented conduits having their upper and lower ends in communication with ambient air. The enclosure receives heated air from the combustion chamber at one side and exhausts smoke and depleted gases at the other side.
Inventors
- 👤 Roger J. Baumbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:31
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885; F24B7/00; F24B7/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A heating system adjunct unit for the use in conjunction with a standard fireplace having a wall inset portion including a combustion chamber comprising: an enclosure positioned forwardly of said wall inset portion proximate said chamber and having an inlet for receiving heated gas from said chamber; an outlet further connected and constructed in said enclosure vertically and laterally spaced from said inlet in said enclosure for receiving heated gas and smoke therefrom and passing it upwardly to ambient air; and a plurality of substantially vertically spaced conduits held in an array and extending through said enclosure for receiving relatively cold air at their lower openings thereof and exhausting heated air from the upper openings thereof, said conduits held in said array and spaced one from the other to permit passage of the heated gas and smoke therebetween in its path intermediate said inlet and said outlet.
Claim 2
Dependent Claim
147 words
A heating system adjunct unit for the use in conjunction with a standard fireplace having a wall inset portion including a combustion chamber comprising: an enclosure positioned forwardly of said wall inset portion proximate said chamber and having an inlet for receiving heated gas from said chamber; an outlet further connected and constructed in said enclosure vertically and laterally spaced from said inlet in said enclosure for receiving heated gas and smoke therefrom and passing it upwardly to ambient air; and a plurality of substantially vertically spaced conduits held in an array and extending through said enclosure for receiving relatively cold air at their lower openings thereof and exhausting heated air from the upper openings thereof, said conduits held in said array and spaced one from the other to permit passage of the heated gas and smoke therebetween in its path intermediate said inlet and said outlet.
Claim 3
Dependent Claim
29 words
The combination as set forth in claim 1 wherein each of said conduits includes at its upper opening a louver set for controlling the flow of heated air therefrom.
Claim 4
Dependent Claim
43 words
The combination as set forth in claim 1 wherein said adjunct unit includes at the base of said enclosure a plurality of spacer elements for allowing clearance for input of relatively cold air at the lower openings of said conduits proximate the floor.
Claim 5
Dependent Claim
34 words
The combination as set forth in claim 1 wherein said conduits are of an upward flaring configuration to expedite the flow of heated air between the respective lower and upper openings of said conduits.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |